According to the way Boeing travels, it is divided into upper Boeing and lower Boeing. The way to get on Boeing is from the tonic to the tonic top and back to the tonic. Bass Boeing goes from the tonic to the tonic bass and back to the tonic. The upper Boeing and the lower Boeing occupy the same duration of the main note, which is 1/4 of the total duration.

Extended data:

Boeing is a kind of decorative sound, and commonly used decorative sounds include leaning, vibrato, echo, Boeing, glide and so on. In the singing (performance) of China folk music, there are a lot of decorative sounds; In some periods of western music, decorative sound was once an important feature of melody style.

Although decorative sound is the decoration of melody sound, it doesn't mean it doesn't matter. There are many decorative sounds in music that play the role of embellishing tunes in playing and singing, which is very important for shaping the image of music.

References:

Boeing? Baidu baike